Fuel-saver.



J. T. MGKEE- FUEL SAVER.

APPLIOATION FILED DEC. 23, 1912. 1,086,834. Patented Feb. 10, 1914;

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J. T. MGKEB.

FUEL SAVER.

I APPLICATION FILED D13G.23I 1912.

1,086,834, Patented Feb. 10, 1914.

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JAMES TENNANT MCKEE, OF ST. JOHN, NEW BRUNSWICK, CANADA, ASSIGNOR OF ONE- I THIRD TO THOMAS E. POWERS AND ONE-THIRD TO J. STARR TAIT, OF ST. JOHN,

NEW BRUNSWICK, CANADA.

To all whom it may concern Be it known that 1, JAMES TENNANT Mc- KEE, a subject of the King of Great Britaln, residing at St. John, in the Province of New Brunswick, Dominion of Canada, have in vented certain new and useful Improvements in Fuel-Savers, of which the following is a specification.

This invention relates to fuel savers to be used in connection with steam boilers, and the objects are to efi'ect economy in fuel and to increase the power of the boiler.

Further objects are to generally simplify and improve the construction so as to cause a complete combustion to be effected, to thoroughly heat the air which is introduced before it is discharged into the combustion chamber and to discharge the air at such point as will cause it to be of maximum efficiency, and it consists essentially of the improved construction hereinafter described in detail in the accompanying specification and drawings.

In the drawings: Figure 1 represents a front view partially in section illustrating a steam boiler and furnace embodying the present invention. Fig. 2 is a longitudinal section. Fig. 3 is a section on the line 22, Fig. 1.

Like characters of reference indicate corresponding parts in all the figures.

Referring to the drawings, A represents the boiler and B the masonry structure supporting the same, 0 represents the bridge wall and D the grate bars and E the furnace. According to the present invention the bridge wall is made relatively thick and formed with four transverse passageways 10, 11, 12 and 13.

F represents an air inlet conduit which is embedded in the wall 15, is opened to the air at the front and connected at its inner extremity to one end of the conduit 11, the passageway 11 being placed in communication at the opposite end with the passageway 10 by means of a connecting passageway 16 and the passageway 10 being connected at the opposite end to an air outlet conduit G, also embedded in the masonry in the wall 15 and turned across the forward part of the boiler in front of the door 17, provided with a downwardly inclined nozzle 18 in advance of the door, the pipe itself being embedded in the front wall 19, the nozzle being located in the door opening Specification of Letters Patent.

Application filed December 23, 1912.

' FUEL-SAVER.

Patented Feb. 10, 191d. Serial No. 738,342.

20. It will be seen that during the operation of the furnace air will be drawn in through the conduit F, passed successively through the passageways 11 and 10, be heated therein, then passed through the conduit G and be discharged through the nozzle 18 onto the fire on the grates D to produce a secondary combustion and thereby increase the efliciency of the fuel. A second air inlet conduit H is provided on the opposite side in the wall 21, said conduit communicating with the passageway 13 and the passageway 18 itself communicating at the opposite end with the passageway 12 by means of a connecting passageway 22, the oppositeend of the passageway 12 being connected with an air outlet conduit I, which ends in a nozzle 23 located within the space in front of the door 24 and adapted to discharge downwardly, the operation being similar to thatalready described with respect to the first mentioned conduit.

J represents a third air inlet conduit which is embedded in the wall 15 and extends downwardly through the bridge wall and is turned to discharge through a nozzle 25 directed toward the front of the grate bars and adapted to discharge in a direction substantially parallel with the surface thereof.

It will be observed that in the system of heating herein provided the air is in all cases supplied to the furnace in the temperature of the furnace and so no cold air comes in contact with the burning fuel. There are also no openings through the furnace door, the hot air discharged into the interior being directed at a different angle and against the natural flow of the escaping gases will form a counter flow draft which will increase the combustion.

As many changes could be made in the above construction and many apparently widely diiferent embodiments of my invention, within the scope of the claim, constructed without departing from the spirit or scope thereof, it is intended that all matter contained in the accompanying specification and. drawings shall be interpreted as illustrative and not in a limiting sense.

What I claim as my invention is:

In a steam boiler furnace and in combination, a boiler, masonry structure supporting the same, a bridge wall, grate bars and furnace, said bridge wall being formed with four transverse passageways 10, 11, 12 and 3, an air inlet conduit connected at its inner extremity to one end of the conduit 11, the conduit 11 being placed in communication at the opposite end with the passage way 10, an air outlet conduit connected to the opposite end of the passageway 10, said outlet conduit being turned across the forward part of the boiler in front of the door thereof, an inclined nozzle on said last mentioned conduit in advance of the door, a

second air inlet conduit communicating.

with the passageway 13, said passageway 13 communicating at the opposite end with the passageway 12, asecond air outlet conduit connected to the opposite end of the pasfront of the boiler and passing downwardly through the bridge wall and turned to dis charge toward the front of the grate bars. In witness whereof I have hereunto set my hand in the presence of two witnesses.

JAMES TENNANT MoKEE.

Witnesses:

J. STARR TAIT, LEWIS C. THOMPSON,

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. O. 

